his residence. Hastings designed a three-story mansion in the Beaux-Arts architecture. Construction took place between 1912 and 1914. The material used for the exterior and parts of the interior of the mansion is Indiana limestone. Frick, along with his wife Adelaide Howard Childs (1859–1931) and daughter Helen Clay Frick (1888–1984), moved in during November 1914. The interior was not completed until 1916 and the large art collection moved in. His son Childs Frick (1883–1965) had married Frances Shoemaker Dixon in late 1913, and consequently never resided in the house. At Frick's death in 1919, he left his house and all of its contents, including art, furniture, and decorative objects, as a museum to the public. His family continued to live in the house until his wife died. Some of the earliest photographic documentation of the interior was taken in 1927 by Frick Art Reference Library photographer Ira W. Martin. Four years after these photographs were taken, on the death of Adelaide Frick, the trustees of the collection began the transformation of the house into a museum. The collection opened to the public in 1935. Around one-third of the pictures of the collection have been acquired since Frick's death. The building itself has been enlarged three times, in 1931–35, 1977 and 2011, which has altered the original appearance of the house. John Russell Pope converted the former courtyard into the enclosed garden court and demolished the porte-cochère to make way for a public entryway, now known as the entrance hall. Frick's office on the ground floor was also demolished to make way for the oval room. The east gallery and the music room are also later additions. Architecture The house is set apart from Fifth Avenue by an elevated garden on the Fifth Avenue side that has three magnolia trees. The house featured an interior courtyard. The entrance for visitors is located on 70th Street. The entrance hall has stone walls which are marble-lined and a ceiling carved by the Piccirilli Brothers. The marble staircase with an intricate wrought metal balustrade leads to the second floor, which was private. The first room on the ground floor is the Fragonard room, named for Jean-Honoré Fragonard's large wall paintings. The room is furnished with 18th-century French furniture and Sèvres porcelain. The following room is the living room with the adjacent panelled Georgian architecture library. The west gallery, where some of the most important